Iowa K-9 cop may have roasted his partner to death in the back of his cruiser.

Authorities say the brutal heat is suspected in the death of a Des Moines police dog found dead inside a patrol vehicle.

Harley, a Labrador retriever assigned to the narcotics team, was found Wednesday afternoon. The temperature had already reached the low 90s.

Police Sgt. Chris Scott says Harley had been working with his human partner, Officer Brian Mathis, on Wednesday. Scott says it was Mathis who found Harley dead in the vehicle.

Investigators are checking how long Harley was left inside the vehicle and whether the air conditioner was on or some windows were rolled down.

ABC